February 2011

Doc ID 4510 Rev 5

1/12

12

ST901T

STD901T

High voltage NPN Darlington transistor for ignition coil

Features

Application

engines

Description

The device is a high voltage NPN transistor in

monolithic special Darlington configuration

designed for applications such as electronic

ignition for small engines (scooters, lawnmowers,

chainsaws).

Figure 1.

Internal schematic diagram

1

3

TAB

DPAK

1

2

3

TAB

TO-220

C

(2, TAB)

B

(1)

E

(3)

Table 1.

Device summary

Order code

Marking

Packages

Packaging

ST901T

901T

TO-220

Tube

STD901T

D901T

DPAK

Tape and reel

www.st.com